Physics

Question 1

Force

Answer 1

A push or pulling effect, measured in Newtons

Question 2

Newton meter

Answer 2

Device used to measure the size of a force

Question 3

Free body diagram

Answer 3

Diagram showing the direction and sizes of forces acting upon, used to calculate resultant forces and motion

Question 4

Unbalanced (resultant) force

Answer 4

Has a value other than 0N and a direction, causes object to change speed

Question 4

Balance (resultant) force

Answer 4

Has a value of 0N, causes motion at a constant speed or no motion

Question 5

Friction

Answer 5

Force that occurs when solids are in motion against each other, converts kinetic energy into thermal energy

Question 5

Energy

Answer 5

The ability to do work (make something happen). Can’t be made or destroyed, only converted from one form to another

Question 6

Drag

Answer 6

Force that occurs when a solids is in motion against a liquid or gas, converts kinetic energy into thermal energy

Question 7

Energy transfer

Answer 7

Converting energy from one form to another

Question 8

Types of energy

Answer 8

Thermal, kinetic, sound, chemical, electrical, light, nuclear, spring potential, gravitational potential

Question 9

Efficiency

Answer 9

How much energy is wasted when an energy transfer occurs
Efficiency = useful energy produced/energy input

Question 10

Speed formula

Answer 10

Speed (m/s) = distance (m) / time (s)

Question 11

Distance time graph

Answer 11

Graph showing the distance an object travels over time

Question 12

Moment/torque

Answer 12

The turning effect of a force, moment = force X distance from pivot

Question 13

Centre of mass

Answer 13

The point of an object through which its mass appears to act. Objects will balance at this point

Question 14

Lever

Answer 14

A bar which rotates around a fixed point called a pivot. Applying a greater force, further away from the pivot makes the lever more effective

Question 15

Gravity

Answer 15

Gravity is the force of mutual attraction between any 2 point masses

Question 16

Magnet

Answer 16

A magnet is a material or object that produces a magnetic field.

Question 17

Magnetic field

Answer 17

Magnetic field is the region around a magnet where it can affect magnetic materials.

Question 18

Electromagnet

Answer 18

An electromagnet only works as a magnet when a current flows through it.

Question 19

Static electricity

Answer 19

Static electricity is an imbalance of electric charges within or on the surface of a material

Question 20

Insulator

Answer 20

An insulator is a material through which charge cannot flow easily.

Question 21

Conductor

Answer 21

A Conductor is a material through which charge can flow easily.

Question 22

Series circuit

Answer 22

Component in series are all in a single loop

Question 22

Parallel circuit

Answer 22

Components in parallel are on different wires.

Question 23

Current

Answer 23

Current is the amount of charge flowing per second in a circuit. It is measured in amperes

Question 24

Potential Difference/voltage

Answer 24

Potential difference is a measure of the energy that can be transformed to charge in a circuit. Potential difference is measured in Volts.

Question 25

Resistance

Answer 25

Resistance is a measure how much a component works against an electric current. Resistance is measured in Ohms

Question 26

Resistance formula
Momentum formula

Answer 26

Resistance is voltage / current
Force * distance from pivor = Newons per meter